In this image taken from video, Britain's Prime Minister David Cameron, centre, speaks during a debate on Syria, in Britain's parliament, London, Thursday August 29, 2013. Britain's leaders said Thursday it would be legal under humanitarian doctrine to launch a military strike against Syria even without authorization from the United Nations Security Council, but it is not certain how much support there is for the government's resolution on Syria.  Behind Cameron are British Foreign Secretary William Hague, obscured 2nd right, and Deputy Prime Minister Nick Clegg, left. (AP Photo / PA) UNITED KINGDOM OUT - NO SALES - NO ARCHIVES

Photo by: PA

In this image taken from video, Britain's Prime Minister David Cameron, centre, speaks during a debate on Syria, in Britain's parliament, London, Thursday August 29, 2013. Britain's leaders said Thursday it would be legal under humanitarian doctrine to launch a military strike against Syria even without authorization from the United Nations Security Council, but it is not certain how much support there is for the government's resolution on Syria. Behind Cameron are British Foreign Secretary William Hague, obscured 2nd right, and Deputy Prime Minister Nick Clegg, left. (AP Photo / PA) UNITED KINGDOM OUT - NO SALES - NO ARCHIVES